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Updated: Jun 1, 2026
Syntheses, Crystallization, and Spectroscopic Characterization of 3,5-Lutidine N-Oxide Dehydrate
Published on: April 24, 2018
11β,13-Dihydro-lactucin-8-O-acetate hemihydrate
Chris F Fronczek1, Marco L Gomez-Barrios, Nikolaus H Fischer
1Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803-1804, USA.
Abstract:
THE TITLE STRUCTURE (SYSTEMATIC NAME: 9-hydroxy-methyl-3,6-di-methyl-3-methyl-ene-2,7-dioxo-3,3a,4,5,9a,9b-hexa-hydro-azu-leno[4,5-b]furan-4-yl acetate hemihydrate), C(17)H(20)O(6)·0.5H(2)O, from Lactuca floridana, has two independent sesquiterpene lactone mol-ecules in the asymmetric unit. Both have their seven-membered rings in the chair conformation. In the crystal, the OH groups and the water mol-ecule form classical O-H⋯O hydrogen bonds with O⋯O distances in the range 2.6750 (17)-2.8160 (18) Å.
